True or false questions (answer correctly please)

One advantage that open pit mines have over shaft mines is that they are less dangerous because there are no trapped gasses to worry about.
True
False

A mineral never has certain elements in the same proportions
True

False

Yosemite Sam was a prospector in Warner Brothers cartoons.
True

False

The chemical composition and crystal structure of a mineral gives it unique characteristics.
True

False

Earthquakes can happen anywhere that two tectonic plates interact.
True

False